000010512 001__ 10512
000010512 005__ 20141205155735.0
000010512 04107 $$aeng
000010512 046__ $$k2008-10-12
000010512 100__ $$aKilar, V.
000010512 24500 $$aUsage of Simplified N2 Method for Analysis of Base Isolated Structures

000010512 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010512 260__ $$b
000010512 506__ $$arestricted
000010512 520__ $$2eng$$aThe paper examines the usage of a simplified nonlinear method for seismic analysis and performance evaluation (N2 method) for analysis of base isolated structures. In the paper the N2 method is applied for analysis of a fixed base and base isolated simple four-storey frame building designed according to EC8. Two different sets of base isolation devices were investigated: a simple rubber (RB) and a similar lead rubber bearing (LRB) base isolation system. For each system a Soft, Normal and Hard rubber stiffness and three different damping values were used. The paper shows how we can obtain base displacement and top (relative) displacement for different bearing stiffness and selected damping. The target base displacement was determined as an intersection of the capacity curve of single degree of freedom system with rigid behavior of the superstructure and demand spectrum curve for selected damping of isolators. In the following step the pushover analysis of the whole isolated structure was performed up to the target base displacement using constant load distribution. The results are presented in terms of base and top displacements and ductility factors for those base isolation systems which were not able to protect the superstructure. It has been shown in the paper that N2 method might be a valuable tool for design, analysis and verification of behavior of base isolated structures with different linear or nonlinear seismic devices. Nonlinear pushover analyses were performed with the computer program SAP2000.

000010512 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010512 653__ $$aBase isolation. RB and LRB seismic isolators. Seismic design. N2 method. Pushover analysis. Effective damping. 

000010512 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010512 720__ $$aKilar, V.$$iKoren, D.
000010512 8560_ $$ffischerc@itam.cas.cz
000010512 8564_ $$s281885$$uhttps://invenio.itam.cas.cz/record/10512/files/05-06-0114.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-06-0114.
000010512 962__ $$r9324
000010512 980__ $$aPAPER